According to the industrial and commercial department of the autonomous region, from the current situation of barcode technology, forgery, fraudulent use and use of cancelled commodity barcodes and illegal transfer of commodity barcodes have occurred from time to time. Therefore, the bar code not only plays the role of product traceability, but also does not necessarily have anti-counterfeiting function.
Extended data:
Bar code composition:
edit
Bar code, also known as bar code symbol, is a parallel line graph composed of a group of regularly arranged bars, spaces and characters, which is used to represent some information. Common bar codes are composed of black bars (referred to as bars) and white bars (referred to as spaces) with great differences in reflectivity.
1. Dead zone
Dead zone refers to a limited area with the same reflectivity as the blank area outside the left and right ends of bar code. It is a white area without any symbol, which is only used to prompt the bar code reader to start scanning.
2. Sponsor
The start character refers to the first character of the bar code symbol, which marks the beginning of the bar code symbol. After the reader confirms the existence of this character, it begins to process the scanning pulse.
3. Data symbols
Data symbol refers to the character after the start symbol, which is used to record the data value of bar code. Its structure is different from the start symbol, allowing two-way scanning.
4. Terminator
Terminator refers to the last character of bar code symbol, which marks the end of a bar code. The reader stops working after confirming this character.
People's Daily Online-Industry and Commerce Department: It is not reliable to distinguish the authenticity of goods by scanning bar codes with mobile phones.